1121202211221 has 16 divisors (see below), whose sum is σ = 1733259457920. Its totient is φ = 714969525600.

The previous prime is 1121202211189. The next prime is 1121202211229. The reversal of 1121202211221 is 1221122021211.

1121202211221 is a `hidden beast` number, since 11 + 21 + 202 + 211 + 221 = 666.

It is not a de Polignac number, because 1121202211221 - 2⁵ = 1121202211189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121202211194 and 1121202211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121202211229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 902738680 + ... + 902739921.

It is an arithmetic number, because the mean of its divisors is an integer number (108328716120).

Almost surely, 2^{1121202211221} is an apocalyptic number.

It is an amenable number.

1121202211221 is a deficient number, since it is larger than the sum of its proper divisors (612057246699).

1121202211221 is a wasteful number, since it uses less digits than its factorization.

1121202211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805478633 (or 1805478627 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121202211221 its reverse (1221122021211), we get a palindrome (2342324232432).

The spelling of 1121202211221 in words is "one trillion, one hundred twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".